No backlinks being shown?

Ok, so I have a problem here. I launched a website about 3 weeks ago, submitting articles and creating web 2.0 blogs. I was getting pingbacks from other blogs who have used my articles with my meta keywords and link, but still no backlinks are shown on any website/program I go to.

Another thing is, my UV's a day have dropped from 250+ a day to about 20 a day in about 9 days.

All my articles are unique, so what am I doing wrong here? Why are there no backlinks being shown? Is it because I am using http://sitename.com instead of www.sitename.com or something?

yes, I've added both to google webmaster tools now. for both http: and without, and www and without, it shows no results as of now. Guess I'll wait it out since google is showing backlinks in webmaster tools.

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